This section is from the book "School Needlework. A Course of Study in Sewing designed for use in Schools", by Olive C. Hapgood. Also available from Amazon: School Needlework: A Course Of Study In Sewing Designed For Use In Schools.
It is not advisable for young pupils to have scissors in their bags, as they lack judgment in their use. Class scissors should be kept in a strong box lined with felt or velvet. Pupils may practise cutting on paper to advantage, so as to become accustomed to the use of scissors. When many button-holes of the same length are to be cut, the annoyance caused by the ends of the scissors catching in the cloth, or by the screw loosening, may be prevented by soldering the screw at the required length.